Dependence of Strength and Strength-Elongation Balance on the Volume Fraction of Cementite Particles in Ultrafine Grained Ferrite/Cementite Steels

摘要

An increase in the cementite volume fraction contributed to an increase in the athermal component of strength. Strain-hardening rate increased with carbon until 0.3 wt. percent C and then caused little change with a further increase in carbon, which was reflected in the change of uniform elongation. The strength-elongation balance could be improved by using the proper cementite volume fraction.